20 February 2015 1W frequency-doubled VCSEL-pumped blue laser with high pulse energy
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We report on a Q-switched VCSEL side-pumped 946 nm Nd:YAG laser that produces high average power blue light with high pulse energy after frequency doubling in BBO. The gain medium was water cooled and symmetrically pumped by three 1 kW 808 nm VCSEL pump modules. More than 1 W blue output was achieved at 210 Hz with 4.9 mJ pulse energy and at 340 Hz with 3.2 mJ pulse energy, with 42% and 36% second harmonic conversion efficiency respectively. Higher pulse energy was obtained at lower repetition frequencies, up to 9.3 mJ at 70 Hz with 52% conversion efficiency.
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Robert Van Leeuwen, Tong Chen, Laurence Watkins, Guoyang Xu, Jean-Francois Seurin, Qing Wang, Delai Zhou, Chuni Ghosh, "1W frequency-doubled VCSEL-pumped blue laser with high pulse energy", Proc. SPIE 9342, Solid State Lasers XXIV: Technology and Devices, 93420N (20 February 2015); doi: 10.1117/12.2077197; https://doi.org/10.1117/12.2077197

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